Hartenstein ran to the locker room after suffering a laceration above his eye during Monday's game against the Kings, James Ham of ESPN 1320 Sacramento reports.
Hartenstein took an elbow from Domantas Sabonis on a rebound attempt and was visibly bleeding immediately after the play. He presumably went to go get stitched up in an effort to return to a tight contest, though the training staff will have the final say on whether he'll be able to continue.